How to Build a Dockerfile, Push to Docker Hub, and Run a Container with the image.

Docker is a powerful tool for packaging applications into portable containers that can run consistently across different environments. In this guide, I'll walk you through the process of creating a Dockerfile, pushing the image to Docker Hub, and running a container from the image.

NOTE

Before we begin, make sure you have the following installed:

1. Docker: Install Docker from the official website.

2. Docker Hub Account: Sign up for a free account at Docker Hub.

3. Basic Knowledge of Terminal/Command Line.

4. Repository

   Step 1: Write Dockerfile

   The Dockerfile is a blueprint for building your Docker image. It contains instructions on how to set up the environment and run your application.

   1. first create a directory using the command code mkdir and enter the directory using the command code cd name of directory

      

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   2. Next step is to create a dockerfile and note you must name it or use the name dockerfile, using the command code vim dockerfile.

      

   3. Input your docker instructions: To save and exit from dockerfile press the esc button and column then wq and enter

      

      Step 2: Build the Docker Image

      Now that we have a Dockerfile, let's build the Docker image.

      1. Run the following command to build the image:

          docker build -t [name your image] .
         

         • -t [name your image]: Tags the image with the name.

         • .: Specifies the build context (current directory)

           

      2. Verify the image was created:

          docker images
         

         

         3, NEXT We have to login our docker hub from the terminal using the command docker login --username=docker hub user account enter. you will be asked for password, once you are in you will get login succeeded.

         

         4, Tag the image with your Docker Hub username: we do this so so docker can recognize the image.

          docker tag your imagename <your-dockerhub-username>/repositoryname:latest
         

5, At this point we need to inspect the image using the command code docker inspect enter

6, Push the image to Docker Hub:

        docker push <your-dockerhub-username>/repositoryname:latest

After Pushing: we will use the image to create a container by running the command code docker run -d --name give the container a name -p8080:80 name of image enter

Conclusion

Congratulations! You've successfully built a Dockerfile, pushed the image to Docker Hub, and run a container. Docker is a powerful tool that simplifies application deployment and ensures consistency across environments. With this knowledge, you can start containerizing your own applications and sharing them with the world.